#include <57header.h>

int num = 10;

void *func(void *p){

    printf("son num: %d \n", num);

    num = 20;

    return NULL;
}
int main(int argc,char*argv[])
{
    pthread_t son_id;
    pthread_create(&son_id, NULL, func, NULL);
    
    sleep(1);
    printf("main num: %d \n", num);

    return 0;
}

